| La Madelaine-sous-Montreuil | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason La Madelaine-sous-Montreuil.svg |
| Arrondissement: | Montreuil |
| Canton: | Berck |
| Insee: | 62535 |
| Postal Code: | 62170 |
| Mayor: | Jean-François Roussel[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CA Deux Baies en Montreuillois |
| Coordinates: | 50.4694°N 1.75°W |
| Elevation M: | 5 |
| Elevation Min M: | 2 |
| Elevation Max M: | 50 |
| Area Km2: | 2.46 |
La Madelaine-sous-Montreuil (in French pronounced as /la madlɛn su mɔ̃tʁœj/, literally La Madelaine under Montreuil; El Madelaine-dsou-Montreu) is a commune in the Pas-de-Calais department in the Hauts-de-France region of France.[2]
La Madelaine-sous-Montreuil is situated adjacent to the northwest of Montreuil-sur-Mer on the D139 road and by the banks of the Canche river.